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Diffstat (limited to 'src/devices/pnp_device.c')
-rw-r--r--src/devices/pnp_device.c105
1 files changed, 56 insertions, 49 deletions
diff --git a/src/devices/pnp_device.c b/src/devices/pnp_device.c
index ad14bbf89a..702aa9253c 100644
--- a/src/devices/pnp_device.c
+++ b/src/devices/pnp_device.c
@@ -32,13 +32,13 @@
/* PNP fundamental operations */
-void pnp_write_config(device_t dev, uint8_t reg, uint8_t value)
+void pnp_write_config(device_t dev, u8 reg, u8 value)
{
outb(reg, dev->path.pnp.port);
outb(value, dev->path.pnp.port + 1);
}
-uint8_t pnp_read_config(device_t dev, uint8_t reg)
+u8 pnp_read_config(device_t dev, u8 reg)
{
outb(reg, dev->path.pnp.port);
return inb(dev->path.pnp.port + 1);
@@ -51,45 +51,49 @@ void pnp_set_logical_device(device_t dev)
void pnp_set_enable(device_t dev, int enable)
{
- uint8_t tmp, bitpos;
+ u8 tmp, bitpos;
tmp = pnp_read_config(dev, 0x30);
- /* handle the virtual devices, which share same LDN register */
+
+ /* Handle virtual devices, which share the same LDN register. */
bitpos = (dev->path.pnp.device >> 8) & 0x7;
- if (enable) {
+ if (enable)
tmp |= (1 << bitpos);
- } else {
+ else
tmp &= ~(1 << bitpos);
- }
+
pnp_write_config(dev, 0x30, tmp);
}
int pnp_read_enable(device_t dev)
{
- uint8_t tmp, bitpos;
+ u8 tmp, bitpos;
+
tmp = pnp_read_config(dev, 0x30);
- /* handle the virtual devices, which share same LDN register */
+
+ /* Handle virtual devices, which share the same LDN register. */
bitpos = (dev->path.pnp.device >> 8) & 0x7;
+
return !!(tmp & (1 << bitpos));
}
-void pnp_set_iobase(device_t dev, unsigned index, unsigned iobase)
+void pnp_set_iobase(device_t dev, u8 index, u16 iobase)
{
- /* Index == 0x60 or 0x62 */
+ /* Index == 0x60 or 0x62. */
pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
pnp_write_config(dev, index + 1, iobase & 0xff);
}
-void pnp_set_irq(device_t dev, unsigned index, unsigned irq)
+void pnp_set_irq(device_t dev, u8 index, u8 irq)
{
- /* Index == 0x70 or 0x72 */
+ /* Index == 0x70 or 0x72. */
pnp_write_config(dev, index, irq);
}
-void pnp_set_drq(device_t dev, unsigned index, unsigned drq)
+void pnp_set_drq(device_t dev, u8 index, u8 drq)
{
- /* Index == 0x74 */
+ /* Index == 0x74. */
pnp_write_config(dev, index, drq & 0xff);
}
@@ -103,26 +107,22 @@ void pnp_read_resources(device_t dev)
static void pnp_set_resource(device_t dev, struct resource *resource)
{
if (!(resource->flags & IORESOURCE_ASSIGNED)) {
- printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010Lx not assigned\n",
- dev_path(dev), resource->index,
- resource_type(resource),
- resource->size);
+ printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010Lx "
+ "not assigned\n", dev_path(dev), resource->index,
+ resource_type(resource), resource->size);
return;
}
- /* Now store the resource */
+ /* Now store the resource. */
if (resource->flags & IORESOURCE_IO) {
pnp_set_iobase(dev, resource->index, resource->base);
- }
- else if (resource->flags & IORESOURCE_DRQ) {
+ } else if (resource->flags & IORESOURCE_DRQ) {
pnp_set_drq(dev, resource->index, resource->base);
- }
- else if (resource->flags & IORESOURCE_IRQ) {
+ } else if (resource->flags & IORESOURCE_IRQ) {
pnp_set_irq(dev, resource->index, resource->base);
- }
- else {
+ } else {
printk(BIOS_ERR, "ERROR: %s %02lx unknown resource type\n",
- dev_path(dev), resource->index);
+ dev_path(dev), resource->index);
return;
}
resource->flags |= IORESOURCE_STORED;
@@ -134,13 +134,12 @@ void pnp_set_resources(device_t dev)
{
struct resource *res;
- /* Select the device */
+ /* Select the logical device (LDN). */
pnp_set_logical_device(dev);
/* Paranoia says I should disable the device here... */
- for(res = dev->resource_list; res; res = res->next) {
+ for (res = dev->resource_list; res; res = res->next)
pnp_set_resource(dev, res);
- }
}
void pnp_enable_resources(device_t dev)
@@ -166,39 +165,45 @@ struct device_operations pnp_ops = {
/* PNP chip opertations */
-static void pnp_get_ioresource(device_t dev, unsigned index, struct io_info *info)
+static void pnp_get_ioresource(device_t dev, u8 index, struct io_info *info)
{
struct resource *resource;
unsigned moving, gran, step;
resource = new_resource(dev, index);
- /* Initilize the resource */
+ /* Initilize the resource. */
resource->limit = 0xffff;
resource->flags |= IORESOURCE_IO;
- /* Get the resource size */
+ /* Get the resource size... */
+
moving = info->mask;
gran = 15;
step = 1 << gran;
- /* Find the first bit that moves */
- while((moving & step) == 0) {
+
+ /* Find the first bit that moves. */
+ while ((moving & step) == 0) {
gran--;
step >>= 1;
}
- /* Now find the first bit that does not move */
- while((moving & step) != 0) {
+
+ /* Now find the first bit that does not move. */
+ while ((moving & step) != 0) {
gran--;
step >>= 1;
}
- /* Of the moving bits the last bit in the first group,
+
+ /*
+ * Of the moving bits the last bit in the first group,
* tells us the size of this resource.
*/
if ((moving & step) == 0) {
gran++;
step <<= 1;
}
- /* Set the resource size and alignment */
+
+ /* Set the resource size and alignment. */
resource->gran = gran;
resource->align = gran;
resource->limit = info->mask | (step - 1);
@@ -241,8 +246,10 @@ static void get_resources(device_t dev, struct pnp_info *info)
resource->size = 1;
resource->flags |= IORESOURCE_DRQ;
}
- /* These are not IRQs, but set the flag to have the
- * resource allocator do the right thing
+
+ /*
+ * These are not IRQs, but set the flag to have the
+ * resource allocator do the right thing.
*/
if (info->flags & PNP_EN) {
resource = new_resource(dev, PNP_IDX_EN);
@@ -262,17 +269,17 @@ static void get_resources(device_t dev, struct pnp_info *info)
}
void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
- unsigned functions, struct pnp_info *info)
+ unsigned int functions, struct pnp_info *info)
{
struct device_path path;
device_t dev;
int i;
- path.type = DEVICE_PATH_PNP;
+ path.type = DEVICE_PATH_PNP;
path.pnp.port = base_dev->path.pnp.port;
- /* Setup the ops and resources on the newly allocated devices */
- for(i = 0; i < functions; i++) {
+ /* Setup the ops and resources on the newly allocated devices. */
+ for (i = 0; i < functions; i++) {
/* Skip logical devices this Super I/O doesn't have. */
if (info[i].function == -1)
continue;
@@ -280,15 +287,15 @@ void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
path.pnp.device = info[i].function;
dev = alloc_find_dev(base_dev->bus, &path);
- /* Don't initialize a device multiple times */
+ /* Don't initialize a device multiple times. */
if (dev->ops)
continue;
- if (info[i].ops == 0) {
+ if (info[i].ops == 0)
dev->ops = ops;
- } else {
+ else
dev->ops = info[i].ops;
- }
+
get_resources(dev, &info[i]);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-20 03:28:35 +0000